High-resolution inverse modelling of European CH<sub>4</sub> emissions using the novel FLEXPART-COSMO TM5 4DVAR inverse modelling system
نویسندگان
چکیده
Abstract. We present a novel high-resolution inverse modelling system (“FLEXVAR”) based on FLEXPART-COSMO back trajectories driven by COSMO meteorological fields at 7 km×7 km resolution over the European COSMO-7 domain and four-dimensional variational (4DVAR) data assimilation technique. FLEXVAR is coupled offline with global TM5-4DVAR to provide background mole fractions (“baselines”) consistent observations assimilated in TM5-4DVAR. have applied for of CH4 emissions 2018 using 24 stations situ measurements, complemented from five discrete air sampling (and additional outside used inversions). The sensitivity inversions different approaches calculate baselines, parameterizations model representation error, settings prior error covariance parameters, inventories, observation sets are investigated detail. Furthermore, compared FLEXPART extended Kalman filter (“FLExKF”) 1?×1? Europe. three systems show overall good consistency major spatial patterns derived inversion increments general only relatively small differences annual total larger country regions. At same time, allow be better reproduced than simulations 1?×1?. models derive higher Germany, France, BENELUX sum anthropogenic reported UNFCCC natural estimated Global Carbon Project inventory, but uncertainty ranges top-down bottom-up emission estimates overlap all In contrast, UK Ireland agree well inventories.
منابع مشابه
Supplement of Inverse modelling of European CH4 emissions during 2006–2012 using different inverse models and reassessed atmospheric observations
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2022
ISSN: ['1680-7316', '1680-7324']
DOI: https://doi.org/10.5194/acp-22-13243-2022